Fully nonlinear wave-current-body interactions by a 3D viscous numerical wave tank
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A finite-difference scheme and a marker-and-cell (MAC) method are used for numerical wave tank (NWT) simulations to investigate the characteristics of nonlinear wave motions and their interactions with a stationary three-dimensional body in the presence of steady uniform currents. The Navier-Stokes (NS) equation is solved for two fluid layers and the boundary values updated at each time step by a finite-difference time-marching scheme in the frame of rectangular coordinate system. The fully-nonlinear kinematic free-surface condition is satisfied by the density-function technique developed for two fluid layers. The incident waves are generated from the inflow boundary by prescribing a velocity profile resembling flexible flap-wavemaker motions, and the outgoing waves are numerically dissipated inside an artificial damping zone located at the end of the tank. Using the NS-MAC NWT, nonlinear wave and current interactions around a stationary vertical truncated circular cylinder are studied and the results are compared with the experimental results of Mercier & Niedzwecki, an independently developed potential-based fully nonlinear NWT, and the second-order diffraction computation.
Proceedings of the International Offshore and Polar Engineering Conference
author list (cited authors)
Park, J. C., & Kim, M. H.
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